From bbd21f24a06d3e02396363fa8cf729310b0791b7 Mon Sep 17 00:00:00 2001
From: binLep <45154147+binLep@users.noreply.github.com>
Date: Tue, 13 May 2025 22:19:37 +0800
Subject: fix upper in xmake.lua

---
 xmake/rules/platform/windows/subsystem/xmake.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xmake/rules/platform/windows/subsystem/xmake.lua b/xmake/rules/platform/windows/subsystem/xmake.lua
index 82b1b45fc..9c64ec808 100644
--- a/xmake/rules/platform/windows/subsystem/xmake.lua
+++ b/xmake/rules/platform/windows/subsystem/xmake.lua
@@ -41,7 +41,7 @@ rule("platform.windows.subsystem")
             if target:has_tool("ld", "clang", "clangxx", "clang_cl") then
                 target:add("ldflags", "-Wl,-subsystem:" .. subsystem, { force = true })
             elseif target:has_tool("ld", "link", "lld-link") then
-                target:add("ldflags", "/SUBSYSTEM:" .. upper(subsystem), { force = true })
+                target:add("ldflags", "/SUBSYSTEM:" .. string.upper(subsystem), { force = true })
             elseif target:has_tool("ld", "gcc", "gxx") then
                 target:add("ldflags", "-Wl,-m" .. subsystem, { force = true })
             elseif target:has_tool("ld", "lld") then
-- 
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